<template>
  <div class="app-container">
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="2" process-status="wait" align-center style="margin-bottom: 40px;">

      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>
    
<el-button type="text" @click="openChapterDialog()">添加章节</el-button>
    <!-- 章节 -->
<ul class="chanpterList">
    <li
        v-for="chapter in chapterVideoList"
        :key="chapter.id">
        <p>
            {{ chapter.title }}
            <span class="acts">
                    <el-button style="" type="text" @click="openVideo(chapter.id)">添加小节</el-button>
                    <el-button style="" type="text" @click="openEditChatper(chapter.id)">编辑</el-button>
                    <el-button type="text" @click="removeChapter(chapter.id)">删除</el-button>
                </span>
        </p>
        <!-- 视频 -->
        <ul class="chanpterList videoList">
            <li
                v-for="video in chapter.children"
                :key="video.id">
                <p>{{ video.title }}
                     <span class="acts">
                    
                    <el-button style="" type="text">编辑</el-button>
                    <el-button type="text" @click="removeVideo(video.id)">删除</el-button>
                </span>
                </p>
            </li>
        </ul>
    </li>
</ul>
<div>
    <el-button @click="previous">上一步</el-button>
    <el-button :disabled="saveBtnDisabled" type="primary" @click="next">下一步</el-button>

</div>
<!-- 添加和修改章节表单 -->
<el-dialog :visible.sync="dialogChapterFormVisible" title="添加章节">
    <el-form :model="chapter" label-width="120px">
        <el-form-item label="章节标题">
            <el-input v-model="chapter.title"/>
        </el-form-item>
        <el-form-item label="章节排序">
            <el-input-number v-model="chapter.sort" :min="0" controls-position="right"/>
        </el-form-item>
    </el-form>
    <div slot="footer" class="dialog-footer">
        <el-button @click="dialogChapterFormVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveOrUpdate">确 定</el-button>
    </div>
    </el-dialog>
<!-- 添加和修改课时表单 -->
<el-dialog :visible.sync="dialogVideoFormVisible" title="添加课时">
  <el-form :model="video" label-width="120px">
    <el-form-item label="课时标题">
      <el-input v-model="video.title"/>
    </el-form-item>
    <el-form-item label="课时排序">
      <el-input-number v-model="video.sort" :min="0" controls-position="right"/>
    </el-form-item>
    <el-form-item label="是否免费">
      <el-radio-group v-model="video.free">
        <el-radio :label="true">免费</el-radio>
        <el-radio :label="false">默认</el-radio>
      </el-radio-group>
    </el-form-item>
    <el-form-item label="上传视频">
      <!-- TODO -->
      <el-upload
            :on-success="handleVodUploadSuccess"
            :on-remove="handleVodRemove"
            :before-remove="beforeVodRemove"
            :on-exceed="handleUploadExceed"
            :file-list="fileList"
            :action="BASE_API+'/eduvod/video/uploadAlyiVideo'"
            :limit="1"
            class="upload-demo">
        <el-button size="small" type="primary">上传视频</el-button>
        <el-tooltip placement="right-end">
            <div slot="content">最大支持1G，<br>
                支持3GP、ASF、AVI、DAT、DV、FLV、F4V、<br>
                GIF、M2T、M4V、MJ2、MJPEG、MKV、MOV、MP4、<br>
                MPE、MPG、MPEG、MTS、OGG、QT、RM、RMVB、<br>
                SWF、TS、VOB、WMV、WEBM 等视频格式上传</div>
            <i class="el-icon-question"/>
        </el-tooltip>
        </el-upload>
    </el-form-item>
  </el-form>
  <div slot="footer" class="dialog-footer">
    <el-button @click="dialogVideoFormVisible = false">取 消</el-button>
    <el-button :disabled="saveVideoBtnDisabled" type="primary" @click="saveOrUpdateVideo">确 定</el-button>
  </div>
</el-dialog>

  </div>
  </template>
  <script>
import chapter from '@/api/edu/chapter'
import video from '@/api/edu/video'
export default {
    data(){
        return{
            saveBtnDisabled:false,
             courseId:'',
            chapterVideoList:[],
             chapter:{ //封装章节数据
                title: '',
                sort: 0
            },
              video: {
                title: '',
                sort: 0,
                free: 0,
                videoSourceId: '',
                 videoOriginalName:''//视频名称
            },
             dialogChapterFormVisible:false,//章节弹框
             dialogVideoFormVisible:false ,//小节弹框
             fileList: [],//上传文件列表
            BASE_API: process.env.BASE_API // 接口API地址
        }
    },
    created(){
      if(this.$route.params && this.$route.params.id){
        this.courseId=this.$route.params.id
        this.getChapterVideo()
      }
    },
    methods:{
       //点击确定调用的方法
        handleVodRemove() {
            //调用接口的删除视频的方法
            video.deleteAliyunvod(this.video.videoSourceId)
                .then(response => {
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除视频成功!'
                    });
                    //把文件列表清空
                    this.fileList = []
                    //把video视频id和视频名称值清空
                    //上传视频id赋值
                    this.video.videoSourceId = ''
                    //上传视频名称赋值
                    this.video.videoOriginalName = ''
                })
        },
        //点击×调用这个方法
        beforeVodRemove(file,fileList) {
            return this.$confirm(`确定移除 ${ file.name }？`);
        },
         //上传视频成功调用的方法
        handleVodUploadSuccess(response, file, fileList) {
            //上传视频id赋值
            this.video.videoSourceId = response.data.videoId
            //上传视频名称赋值
            this.video.videoOriginalName = file.name
        },
        handleUploadExceed() {
            this.$message.warning('想要重新上传视频，请先删除已上传的视频')
        },
      //==============================章节操作====================================
           //删除小节
        removeVideo(id) {
            this.$confirm('此操作将删除小节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                video.deleteVideo(id)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除小节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
        },
        //添加小节弹框的方法
        openVideo(chapterId) {
            //弹框
            this.dialogVideoFormVisible = true
            //设置章节id
            this.video.chapterId = chapterId
        },
          //添加小节
        addVideo() {
            //设置课程id
            this.video.courseId = this.courseId
            video.addVideo(this.video)
                .then(response => {
                    //关闭弹框
                    this.dialogVideoFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '添加小节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
        },
        saveOrUpdateVideo() {
            this.addVideo()
        },
      //==============================章节操作====================================
        removeChapter(chapterId) {
            this.$confirm('此操作将删除章节, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).then(() => {  //点击确定，执行then方法
                //调用删除的方法
                chapter.deleteChapter(chapterId)
                    .then(response =>{//删除成功
                    //提示信息
                    this.$message({
                        type: 'success',
                        message: '删除成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
            }) //点击取消，执行catch方法
        },
      //修改章节弹框数据回显
         openEditChatper(chapterId) {
            //弹框
            this.dialogChapterFormVisible = true
            //调用接口
            chapter.getChapter(chapterId)   
                .then(response => {
                    this.chapter = response.data.chapter
                })
        },
       openChapterDialog() {
            //弹框
            this.dialogChapterFormVisible = true
            //表单数据清空
            this.chapter.title = ''
            this.chapter.sort = 0
        },
           //添加章节
        addChapter() {
            //设置课程id到chapter对象里面
            this.chapter.courseId = this.courseId
            chapter.addChapter(this.chapter)
                .then(response => {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '添加章节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
        },
            //修改章节的方法
        updateChapter() {
            chapter.updateChapter(this.chapter)
                .then(response =>  {
                    //关闭弹框
                    this.dialogChapterFormVisible = false
                    //提示
                    this.$message({
                        type: 'success',
                        message: '修改章节成功!'
                    });
                    //刷新页面
                    this.getChapterVideo()
                })
        },
       saveOrUpdate() {
         if(!this.chapter.id) {
                this.addChapter()
            } else {
                this.updateChapter()
            }
        },
      getChapterVideo(){
        chapter.getAllChapterVideo(this.courseId)
        .then(response=>{
        this.chapterVideoList= response.data.allChapterVideo
        })
      },
        previous(){
             this.$router.push({path:'/course/info/'+this.courseId})
        },
        next(){
            this.$router.push({path:'/course/publish/'+this.courseId})
        }
    }
}
</script>
<style scoped>
.chanpterList{
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
}
.chanpterList li{
  position: relative;
}
.chanpterList p{
  float: left;
  font-size: 20px;
  margin: 10px 0;
  padding: 10px;
  height: 70px;
  line-height: 50px;
  width: 100%;
  border: 1px solid #DDD;
}
.chanpterList .acts {
    float: right;
    font-size: 14px;
}
.videoList{
  padding-left: 50px;
}
.videoList p{
  float: left;
  font-size: 14px;
  margin: 10px 0;
  padding: 10px;
  height: 50px;
  line-height: 30px;
  width: 100%;
  border: 1px dotted #DDD;
}
</style>
